(RE-1497) Remove quantal from build_defaults

This commit removes quantal from all build defaults because it is end of
life. It removes the defaults from the build_defaults yaml.
Merge pull request #32 from clantant/RE-1497/master/srcs

(RE-1497) Remove quantal from build_defaults
(MCOP-271) Remove saucy from build defaults

This commit removes saucy from build defaults. It went EOL on July 17,
2014